An official state media website in Iran has posted a message heralding the coming of the Shiite messianic figure, Imam Mahdi, noting he could arrive with Jesus by the spring equinox. "Imam Mahdi (may God hasten his reappearance) will appear all of a sudden on the world scene with a voice from the skies announcing his reappearance at the holy Ka'ba in Mecca," the message says. The Islamic Republic of Iran broadcasting website said in a program called "The World toward Illumination," that the Mahdi will form an army to defeat the enemies of Islam in a series of apocalyptic...